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Predict the Output

Source files are here: . If you need instructions on what do with these files, try here.

Have a look at the following Java files and, as before, predict the output.

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Main.java

package ex4;
 
public class Main {
    public static void main(String args[]) {
        Address a = new Address();
        Dao.save(a);
        a.setZip(null);
        Dao.save(a);
        a.setZip("75001");
        Dao.save(a);
        Dao.save(a);
    }
}

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Dao.java

package ex4;
 
public class Dao {
    public static void save(Object o) {
        if (o != null) {
            System.out.printf("Saving: %s\n", o.getClass());
        }
    }
}

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Address.java

Address is unchanged from the previous example. It is a simple Java Bean style class with setters and getters.

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Assignment: Predict the Output

Please take a few moments to predict the output before moving on.

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